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leds: Ensure led->trigger is set earlier

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Make sure led->trigger is valid before calling trigger->activate

Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
This commit is contained in:
Dmitry Baryshkov 2008-07-16 22:51:14 +01:00 committed by Richard Purdie
parent f46e9203d9
commit fe3025b55c
1 changed files with 2 additions and 1 deletions
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3
drivers/leds/led-triggers.c
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@ -111,16 +111,17 @@ void led_trigger_set(struct led_classdev *led_cdev, struct led_trigger *trigger)
flags);
if (led_cdev->trigger->deactivate)
led_cdev->trigger->deactivate(led_cdev);
led_cdev->trigger = NULL;
led_set_brightness(led_cdev, LED_OFF);
}
if (trigger) {
write_lock_irqsave(&trigger->leddev_list_lock, flags);
list_add_tail(&led_cdev->trig_list, &trigger->led_cdevs);
write_unlock_irqrestore(&trigger->leddev_list_lock, flags);
led_cdev->trigger = trigger;
if (trigger->activate)
trigger->activate(led_cdev);
}
led_cdev->trigger = trigger;
}
EXPORT_SYMBOL_GPL(led_trigger_set);